This is a 27" x 19" Egyptian poster for the 1971 Cheh Chang
film Duel of Fists written by Kuang Ni and starring David
Chiang as Fan Ko. Plot summary: After discovering they are brothers,
two martial arts experts take on a crime syndicate.

The original Hong Kong title is "Kuen gik"; the Chinese Mandarin title is "Quan ji; the literal English title is "Fist Attack".